i definitely DO NOT want ffxiv to go free to play but.. if it were

Cash Shop offering vanity items: Please God, no. What happens here is developers usually slack on the free gear and make the cash shop stuff look amazing. In the end the game just ends up looking like some fashion caste system. Vindictus wasn't too bad with this, but still.

Episode type content offering side quests or new scenarios: Sure why, not. FFXI is P2P and they managed to release three of these without too many complaints.

DLC offering new dungeons: Similar to the above. Wouldn't mind it, but it could get damn annoying after a while.

If anything they should just charge for extra character slots. Which they're going to do anything.

in short, i really hate F2P. Very happy with Legacy sub of $10/month lol